Great Cormorant

Phalacrocorax carbo

Order

SULIFORMES

Family

Cormorants (Phalacrocoracidae)

Code 4

GRCO

Code 6

PHACAR

ITIS

Egg Color:

Pale blue or green, often nest stained



Number of Eggs:

3 - 5



Incubation Days:

38 - 31



Egg Incubator:

Both sexes



Nest Location:

On ground or cliff ledges.



Nest Material:

Twigs, seaweed, grasses, moss and bits of refuse



Migration:

Migratory



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General

Great Cormorant: Largest North American comorant is black with bright yellow throat pouch bordered with white feathers. Females are similar, juveniles have brown upperparts and white belly.

Range and Habitat

Great Cormorant: Found along the Atlantic Coast of North America. Breeds in the northern part of its range from Newfoundland and Labrador, though the Gulf of St. Lawrence, and south to New England. Winters along the coast from New England south to northern Florida. Prefers rocky coasts with sheltered inshore waters.

Breeding and Nesting

Great Cormorant: Three to five pale blue or green eggs incubated by both sexes 28 to 31 days in a nest of twigs, seaweed, and refuse, lined with grasses and moss on high ground.

Foraging and Feeding

Great Cormorant: Dives for fish and crustaceans.

Vocalization

Great Cormorant: Usually silent. Low groan during breeding.

Similar Species

Great Cormorant: Double-crested Cormorant is smaller with orange throat patch.

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UpperpartsX
Back, rump, hindneck, wings, and crown.
BellyX
The ventral part of the bird, or the area between the flanks on each side and the crissum and breast. Flight muscles are located between the belly and the breast.
Parts of a Standing bird X
Head Feathers and Markings X
Parts of a Flying bird X